Are you contending that because the device is not part of their body —- or forces a non-functioning part of their body to work —- that they then are not _really_ speaking by having their throat movements synthetically vocalised?

Does this mean someone with a prosthetic hand isn’t _really_ holding something when they use that hand to hold a cup of water? Afterall, the prosthesis isn’t part of their body in the same way this device is, no?

This thing, while basic now, allows mutes to synthesise their speech by analysing the movements in their throat. Movements that happen when a non-mute is speaking. Thats very different than say text-to-speech where I’d be more inclined to agree.